<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        .grid {
            margin: auto;
            width: 530px;
            text-align: center;
        }
        
        .grid table {
            border-top: 1px solid #C2D89A;
            width: 100%;
            border-collapse: collapse;
        }
        
        .grid th,
        td {
            padding: 10;
            border: 1px dashed #F3DCAB;
            height: 35px;
            line-height: 35px;
        }
        
        .grid th {
            background-color: #F3DCAB;
        }
        
        .grid .book {
            padding-bottom: 10px;
            padding-top: 5px;
            background-color: #F3DCAB;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="grid">
            <div>
                <h1>图书管理</h1>
                <div class="book">
                    <section>图书总数: {{tatol}}</section>
                    <div>
                        <label for="id">
                  编号：
                </label>
                        <input v-focus type="text" id="id" v-model='id' :disabled='float'>
                        <label for="name">
                  名称：
                </label>
                        <input type="text" id="name" v-model='name'>
                        <button @click='addbook' :disabled='flog'>提交</button>
                    </div>
                </div>
            </div>
            <table>
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>名称</th>
                        <th>时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr :key='item.id' v-for='(item,index) in books'>
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>
                        <td>{{item.date | format('yyyy-MM-dd hh:mm:ss')}}</td>
                        <td>
                            <a href="" @click.prevent='editbook(item.id)'>修改</a>
                            <span>|</span>
                            <a href="" @click.prevent='delbook(index,item.id)'>删除</a>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
    <script type="text/javascript" src="../../vue.js"></script>
    <script type="text/javascript">
        //   图书管理-图书列表展示功能
        //   注意事项：<a href="" @click.prevent>修改</a>
        //   事件绑定时，可以只添加修饰符，而不绑定事件函数

        Vue.filter('format', function(val, params) {
            function dateFormat(date, format) {
                if (typeof date === "string") {
                    var mts = date.match(/(\/Date\((\d+)\)\/)/);
                    if (mts && mts.length >= 3) {
                        date = parseInt(mts[2]);
                    }
                }
                date = new Date(date);
                if (!date || date.toUTCString() == "Invalid Date") {
                    return "";
                }
                var map = {
                    "M": date.getMonth() + 1, //月份 
                    "d": date.getDate(), //日 
                    "h": date.getHours(), //小时 
                    "m": date.getMinutes(), //分 
                    "s": date.getSeconds(), //秒 
                    "q": Math.floor((date.getMonth() + 3) / 3), //季度 
                    "S": date.getMilliseconds() //毫秒 
                };

                format = format.replace(/([yMdhmsqS])+/g, function(all, t) {
                    var v = map[t];
                    if (v !== undefined) {
                        if (all.length > 1) {
                            v = '0' + v;
                            v = v.substr(v.length - 2);
                        }
                        return v;
                    } else if (t === 'y') {
                        return (date.getFullYear() + '').substr(4 - all.length);
                    }
                    return all;
                });
                return format;
            }
            return dateFormat(val, params);
        })

        Vue.directive('focus', {
            inserted: function(el, params) {
                el.focus()
            }
        })
        var vm = new Vue({
            el: '#app',
            data: {
                books: [],
                date: '',
                id: '',
                name: '',
                float: false,
                flog: false,
            },

            created() {
                data = [{
                    id: 1,
                    name: '三国演义',
                    date: new Date()
                }, {
                    id: 2,
                    name: '水浒传',
                    date: new Date()
                }, {
                    id: 3,
                    name: '红楼梦',
                    date: new Date()
                }, {
                    id: 4,
                    name: '西游记',
                    date: new Date()
                }]
                this.books = data
            },
            methods: {
                addbook() {
                    var book = {
                        id: this.id,
                        name: this.name,
                        date: new Date()
                    }
                    if (this.float) {
                        // book.date = this.date
                        // this.books.splice(this.id - 1, 1, book)
                        this.books.some((item) => {
                            if (item.id === this.id) {
                                item.name = this.name
                                return true
                            }
                        })
                        this.float = false
                    } else {
                        this.books.push(book)
                    }
                    this.id = this.name = ''
                },
                editbook(id) {
                    const book = this.books.filter((item) => {
                        return item.id === id
                    })
                    this.date = book[0].date
                    this.id = book[0].id
                    this.name = book[0].name
                    this.float = true
                },
                delbook(index, id) {
                    // this.books.splice(index, 1)
                    this.books = this.books.filter((item) => {
                        return item.id !== id
                    })

                }











                // addbook() {
                //     if (this.id === '' || this.name === '') {
                //         return
                //     }
                //     var book = {
                //         id: this.id,
                //         name: this.name,
                //         date: new Date()
                //     }
                //     if (this.float) {
                //         //方法一
                //         book.date = this.date
                //         this.books.splice(this.id - 1, 1, book)
                //             // 方法二
                //             // this.books.some((item) => {
                //             //     if (item.id === this.id) {
                //             //         item.name = this.name
                //             //         return true //打断循环 ，优化性能
                //             //     }
                //             // })
                //         this.float = false
                //     } else {
                //         this.books.push(book)
                //     }
                //     this.id = this.name = ''
                // },
                // delbook(index, id) {
                //     // 方法一
                //     // this.books.splice(index, 1)
                //     // 方法二
                //     this.books = this.books.filter((item) => {
                //         return item.id !== id
                //     })
                // },
                // editbook(id) {
                //     var book = this.books.filter(function(item) {
                //         return item.id === id
                //     })[0]
                //     this.name = book.name
                //     this.id = book.id
                //     this.date = book.date
                //     this.float = true
                // }
            },
            computed: {
                tatol() {
                    return this.books.length
                }
            },
            watch: {
                name: function(newName) {
                    let flog = this.books.some((item) => {
                        return item.name === newName
                    })
                    this.flog = flog
                }
            }
        });
    </script>
</body>

</html>